Sentences with phrase «high radiation doses»

Proton therapy delivers high radiation doses directly to the brain tumor site, with no damage to nearby healthy tissue.

In most of these cases, people received high radiation doses through drinking milk from cows that had grazed on iodine - contaminated pasture.

While high radiation doses can eventually cause cancer, the immediate health effect is to destroy dividing cells — including blood cells — which wipes out the immune system.

Threats of explosions and dangerously high radiation doses are just some of the risks facing workers trying to avert complete meltdowns at multiple reactors in Japan

An extended stay on Mars, with its extremely thin atmosphere, would be lethal due to the high radiation doses, notwithstanding Matt Damon's successful Mars colonization in the movie «The Martian.»

Patients who received the highest radiation doses had a risk of stomach cancer nearly threefold greater than patients who received the lowest doses.

Although the shorter therapy requires higher radiation doses, the experts found that this option may result in better quality of life.

Not exact matches

Researchers blasted rats with full - body doses of RF radiation (mostly at higher levels than those associated with cell phones) from the time they were born until they were two years old for nine hours a day.

In fact, the National Council on Radiation Protection and Measurements reported in 2009 that air crews have, on average, the highest yearly dose of radiation out of all radiation - exposed workers in the US.

They're also advised to avoid flying when the sun is having a solar particle event, which can deliver a higher dose of radiation in one flight than is recommended for the entirety of a pregnancy.

Diagnostic Radiology at Boston Children's is designed to facilitate high - quality and rapid x-ray examinations using the lowest possible radiation doses for your child, no matter her size, age or medical condition.

But it takes a higher dose of radiation to zap bacteria than it does to kill pests.

Among the advances that have already been made are linear accelerators that generate higher - energy radiation beams, and more versatile patient tables that enable radiation doses to be delivered to the tumor from a variety of angles and directions.

Mild gastrointestinal and genitourinary toxicity as reported by doctors was observed more frequently in patients getting the higher daily dose, shorter frequency radiation, but no differences were observed in more severe side effects, which were rare (less than 5 percent) with either regimen.

«There was a dogma in radiation oncology that a higher dose would be super lethal,» recalls Suit.

«With some of the technological advances in radiation treatments that have occurred in the last five to 10 years, we're beginning to re-look at the issue and ask — can we target the radiation precisely enough and with a high enough dose to knock the cancer back?»

Conventional radiation with photons gave way to intensity - modulated radiation therapy, or IMRT, in which more precise beams of photons could be moved dozens or hundreds of times with varying intensities, attacking tumors in three dimensions with safer high doses.

Previously, studies have consistently demonstrated that conventionally fractionated high dose external beam radiation therapy (CRT), consisting of daily treatment for two months, decreases prostate cancer recurrence, and improves metastasis - free survival.

And when all food was grown in the area, radiation doses were 50 to 200 percent higher around the coal plants.

«In an earlier phase I clinical study, our group has shown that increasing the dose of radiation delivered daily with high precision and using image guidance may offset the need for chemotherapy in improving survival, and it may also improve quality of life measures by reducing treatment periods in half.

Similar types of more severe cognitive dysfunction are common in brain cancer patients who have received high - dose, photon - based radiation treatments.

The radiation - sensitive rats that received higher doses of radiation had a higher concentration of transporters for the neurotransmitter dopamine, which plays a role in vigilance and attention, says Catherine M. Davis, Ph.D., a postdoctoral fellow in the Department of Psychiatry and Behavioral Sciences and the study's first author.

Conventional transplant conditioning employs radiation and / or high - dose cytotoxic drugs (also known as alkylators) to destroy the bone marrow and blood and immune cells; it also causes widespread cellular damage throughout the body.

Johns Hopkins scientists report that rats exposed to high - energy particles, simulating conditions astronauts would face on a long - term deep space mission, show lapses in attention and slower reaction times, even when the radiation exposure is in extremely low dose ranges.

The large number of abnormalities appearing so soon after the accident «would indicate that these children almost certainly received a very high dose of thyroid radiation from inhaled and ingested radioactive iodine,» antinuclear crusader Helen Caldicott wrote in a post on her homepage.

The early cleanup workers faced a higher dose, with the risk of acute radiation sickness, resulting in nausea, low blood cell counts and neurological issues.

The benefit of chemotherapy, in addition to craniospinal radiation, was seen in adult patients with medulloblastoma (MB), including those with localized disease who received high - dose radiation treatment following surgery.

Levels detected in a short duration pulse at the plant itself have reached as high as 8,217 microSieverts per hour, or eight times the dose endured in a typical CT scan and four times the normal dose of background radiation in a year.

After surgeons used radiation to burn away the tumor, she was switched to interleukin - 2, a naturally occurring protein that, in high doses, sends the body's immune defenses into overdrive.

«The ideal next step,» Prof Morris will say, «would be to undertake randomised comparisons of LDR - PB boost against its principal alternatives — temporary high - dose - rate brachytherapy implants (HDR - PB) 3, stereotactic body radiation therapy using extreme hypofractionation4, and combined surgery and post-operative radiation therapy.

High - altitude flight exposes us to cosmic rays: the radiation dose on a flight from London to Tokyo is roughly equivalent to a chest X-ray.

There is no known way to prevent most types of leukemia, though some types may be prevented by avoiding high doses of ionizing radiation, exposure to the chemical benzene, smoking and certain types of chemotherapy.

For more than a century, scientists have assumed your body reacts to that radiation in much the same way it does to high doses — only on a much smaller scale.

Surprisingly, low - dose radiation takes longer for the body to repair than damage from high doses does.

In their experiments, the geomicrobiologists subjected the bacteria to high doses of ultraviolet radiation — either in the presence or the absence of the iron minerals the bacteria themselves produce.

The dose of high - energy particles resembled the radiation likely to pass through the unprotected hull of a spaceship over the course of a mission to Mars, Limoli says.

Due to the meltdown in that reactor, radiation levels are too high for any human to enter without receiving an unacceptable dose.

Proton beam therapy has the ability to deliver high doses of radiation directly to a tumour site with very little radiation being absorbed into healthy tissue.

The leukaemia rate in children whose fathers accumulated the highest doses of radiation before conception (more than 100 millisieverts) was nearly six times greater.

Recent studies have shown women with cancer in the left breast are at higher risk of heart disease, and that the risk increases proportionately with the dose of radiation the heart is exposed to during treatment.

About 80 percent of patients receiving high - dose, short - course therapies had good cosmetic results, similar to longer - course treatments with smaller radiation doses.

Studies have shown that the risk of heart disease is higher in this group of women after radiation treatment because it can be difficult to ensure that a sufficient dose of radiation is delivered to the left breast while adequately shielding the heart from exposure.

«In extreme cases, if the dose is too high radiation can modify the cellular structure and generate alteration in the cells of organs found near the tumor, this causes them to lose their functions,» said Massillon, who was honored for her research with the IUPAP Young Scientist Prize 2015 awarded by the International Union of Pure and Applied Physics.

The image quality provided by the latest digital detectors permits radiologists to see fine detail without resorting to high doses of radiation.

Over the course of seven hours, animal radiologist Anthony Fischetti subjected them to high doses of radiation in the hospital's CT scanner.

SBRT provides a higher dose of radiation, meaning patients have fewer treatments.

Significantly, the effect of PARTICLE in limiting the time and extent of the radiation - induced increase in DNA methylation is more pronounced at lower radiation doses than at higher doses.

This linear no - threshold (LNT) dose - response relationship has been used to extrapolate the risks of low doses of radiation from epidemiological studies that were done following exposure to much higher doses of radiation (e.g. survivors of the atomic bombings).

Two groups were analyzed: 126 localized intermediate risk CaP patients who had received image - guided radiation therapy (IGRT) treatments, with a mean dose of 74.6 Gy; and 154 localized intermediate and high risk CaP patients who had undergone radical prostatectomy (RP), which is the surgical removal of the entire prostate gland.

The safety study sets the stage for phase II clinical trials looking at whether high dose vitamin C is effective at extending overall lifespan and quality of life for patients undergoing radiation and chemotherapy.